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Stockholders' equity | 12 Months Ended
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Dec. 31, 2012
Stockholders' Equity Note [Abstract] |
Stockholders' equity | Note 8 - Stockholders' equity On September 5, 2008, the Company’s shelf registration statement on Form S-3 (the “Shelf Registration”) was declared effective by the SEC. On July 31, 2009, Hudson entered into a Placement Agent Agreement with Roth Capital Partners, (“Roth”), engaging Roth to act as placement agent for a registered direct offering under the Shelf Registration to sell, on a best efforts basis, 3,870,000 shares of the Company’s common stock at a sale price of $1.15 per share (the “2009 Offering”). A closing of the 2009 Offering was held on August 5, 2009, at which time, Hudson sold 1,470,000 shares of its common stock at $1.15 per share and received net proceeds of approximately $1,400,000 and no other closings were completed. As placement agent for the 2009 Offering, Roth received $101,000 and a warrant to purchase 73,500 shares of common stock at an exercise price of $1.4375 per share, plus reimbursement of its expenses of $56,000. The estimated fair value of the warrant was approximately $48,000 and such warrant was charged to additional paid-in capital as compensation expense to Roth. On July 7, 2010, the Company sold 2,737,500 units, with the aggregate units consisting of 2,737,500 shares of the Company’s common stock and warrants to purchase 1,368,750 shares, at a price of $2.00 per unit in a registered direct offering (the “2010 Offering”) pursuant to the Shelf Registration. The warrants issued as part of the 2010 Offering have an exercise price of $2.60 per share and are exercisable for a five-year period, which commenced on January 7, 2011. The net proceeds pursuant to the 2010 Offering were approximately $4,900,000. The value of the aggregate number of warrants issued pursuant to the 2010 Offering was approximately $1,300,000 and such amount was charged as a component of stockholders’ equity to additional paid-in capital. Effective as of March 4, 2011, the Company re-purchased warrants to purchase 150,000 shares of the Company’s common stock, at a price of $0.60 per share, which warrants were issued in connection with the 2010 Offering. On March 7, 2011, the remaining 1,218,750 warrants issued in connection with the 2010 Offering were amended on consent of the holders of more than two-thirds of the remaining warrants, to among other things, extend the expiration date of the warrants to July 7, 2016. On May 17, 2012, the Company issued 20,000 shares of the Company’s common stock to a certain consultant for services, and the Company recognized $74,000 in general and administrative expenses for this service. In connection with an April 2008 amendment of the Company’s prior credit facility with Keltic, the Company issued an aggregate of 100,000 five-year common stock purchase warrants exercisable at $1.88 per share (the “Keltic Warrants”). On August 3, 2012, the Company issued 53,140 shares of common stock upon the cashless exercise of the Keltic Warrants based upon a fair market valuation of $ 4.012 per share on the exercise date (as calculated under the warrants). The Company did not receive any cash proceeds upon the exercise of the Keltic Warrants. On November 9, 2012, the Company issued 133,589 shares of the Company’s common stock, at a price of $3.743 per share, to EffTec, in connection with the Company’s purchase from EffTec’s subsidiary of its proprietary Efftrack™ software. The Company also issued 26,716 shares of its common stock, at a price of $3.743 per share, to Scott Macon, Ltd in payment for services it performed as the Company’s advisor in the EffTec Transaction.

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- Definition The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Preferred Stock -URI http://asc.fasb.org/extlink&oid=6521494 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187143-122770 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section B -Paragraph 7, 11A -Chapter 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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